My Top 5 Sourdough Starter Jars (And Why the Right Jar Actually Matters)

If you have ever opened your cupboard to find dried starter glued to the outside of a jam jar, or peeled a crust off the top of your starter because it dried out overnight, you already know that not all jars are created equal. The jar you keep your starter in is not just storage. It affects how easily gases escape, how quickly your starter dries out on top, and honestly, how much you enjoy the whole process.

I switched jars more times than I would like to admit before landing on what actually works. Here is what I have learned, plus five solid options to consider if you want to upgrade yours.

What to Actually Look For in a Sourdough Jar

Before we get to the list, here is what matters:

• Loose-fitting or vented lid: Your starter produces carbon dioxide as it ferments. A jar sealed too tightly can build pressure, and in extreme cases, can genuinely pop its lid off. You want something you can rest on top rather than screw down hard.

• Wide mouth: You will be getting a spoon or spatula in and out regularly, and a narrow neck makes feeding and cleaning far more annoying than it needs to be.

• Clear sides: You need to see the rise, the bubbles, and the fall. A jar with markings or a rubber band you can move up as a level indicator is genuinely useful, not a gimmick.

• Easy to clean: Straight sides beat curved ones. Dried starter is stubborn stuff.

• Room to double or triple in size: A jar that is already half full when you feed is a jar that will overflow onto your worktop.

Cloth covers and little fabric caps look charming on social media, but in my experience they let the top of the starter dry out and form a crust rather than protecting it. A loose-fitting solid lid works far better.

My Top 5 Picks

1. Wide-mouth glass jar with a loose clip-top lid. This is the classic choice for good reason. The rubber seal on a clip-top jar can simply be left unclipped and rested on top, which gives you a loose seal that lets gas escape without your starter drying out. Glass will not hold onto smells or stains the way plastic can over time. This 500ml ARGON Tableware Glass Jar with Airtight Metal Clip Lid is great for starters as long as you don't fully tighten the clip.

2. Straight-sided glass jars with plastic screw lids (used loosely). A set of straight-sided jars, screw lid rested on top rather than tightened, gives you clear visibility and dishwasher-safe convenience. Buying a set means you always have a clean spare ready when your current one needs a wash. I love these Kilner 500ml Wide Mouth Preserve Jars linked below - they are my daily go-to item to feed and rise my levain in before making my sourdough.

3. A dedicated jar with a rubber band or elastic level marker. Some jars come with a built in rubber band you can slide up to mark where your starter started. This single feature genuinely helps you learn when your starter has peaked, which matters far more than it sounds like it should. The JUSJUBR 730ml Sourdough Starter Jar Kit could be good for a sourdough newbie who gets reassurance from having a ready to start kit. It also features a temperature strip, silicone spatula and cloth cap.

4. A loose-lidded jar. For anyone who worries their starter might rise over the lip of the jar, having a loose lid that will easily rise to allow gases and overflowing starter out can be useful. This Brod & Taylor 300ml Sourdough Starter Jar, is made from durable borosilicate glass with a loose-fitting plastic lid

5. A stackable, fridge-friendly small jar (100 to 250ml). If you keep a small maintenance starter in the fridge and feed weekly, you do not need anything huge. A compact jar in the fridge saves shelf space and keeps your starter tidy between bakes. I love these LATERN 8 Piece 120ml Mini Mason Jars linked below - I use these daily for keeping my small maintenance starter ready to make a levain from.

My Quick Tip

Keep two jars in rotation. Feed into a clean jar each time rather than scraping down the same one repeatedly. It sounds fussy, but it keeps your starter healthier and cuts down on any stray mould risk around the rim.

Related Reading

How to make a sourdough starter from scratch